Results 111 to 120 of about 1,928,394 (212)

Conversor Cc-ca Trifásico Com Comutação Em Baixa Frequência E Baixa Distorção HarmÈnica [PDF]

open access: yes, 2002
Conversor CC-CA trifásico com comutação em baixa frequência e baixa distorção harmônica, caracterizado pelo fato de que o conversor CC-CA trifásico ora tratado utiliza um circuito que é uma estrutura em ponte, possuindo seis transistores, que podem ser ...
Pomilio Jose Antenor
core  

2D Skeletal Muscle Thin Film Actuators Enhance Efficiency of Biohybrid Robots

open access: yesAdvanced Functional Materials, EarlyView.
2D skeletal muscle thin film actuators generate millinewton‐scale forces and millimeter‐scale strokes while remaining functional for over 30 days. Their force density is 20‐fold higher than 3D skeletal muscle actuators, enabling multi‐fin robots with tunable speed and multidirectional steering.
Maheera Bawa   +5 more
wiley   +1 more source

Conversores CC-CC básicos não-isolados quadráticos de três níveis [PDF]

open access: yes, 2006
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Elétrica.Este trabalho introduz uma nova célula de comutação formada por dois diodos, dois interruptores comandados, dois ...
Bottarelli, Marlos Gatti
core  

Microscale Patterning of Ultrahigh‐Viscosity Metallic‐Polymer Composites via Embedded Droplet Writing

open access: yesAdvanced Functional Materials, EarlyView.
A hybrid additive manufacturing platform integrates direct droplet writing of metallic composite with VAT photopolymerization to fabricate architected soft magnetic composites. This approach enables microscale patterning of high‐viscosity materials for programmable actuators, adaptive fluidic devices, and switchable adhesives, offering tunable ...
Yeowon Yoon   +4 more
wiley   +1 more source

Conversor cc-cc de alto ganho baseado no conversor Cuk [PDF]

open access: yes, 2017
TCC (graduação) - Universidade Federal de Santa Catarina. Centro Tecnológico. Engenharia Elétrica.Este trabalho apresenta o estudo sobre um conversor cc-cc de alto ganho e alto rendimento baseado no conversor Cuk com indutor acoplado e multiplicador de ...
Pereira, Airton Isaac
core  

Melanin's Role in Balancing Mechanical Strength and Reproductive Output in Environmentally Stressed Fungal Spores

open access: yesAdvanced Functional Materials, EarlyView.
Melanin content directly controls fungal spore mechanical properties, with pigmented spores achieving rupture forces two orders of magnitude higher than hyaline spores. Environmental stress drives this quantity‐quality tradeoff; stressed species invest energy in melanin‐reinforced, mechanically superior thick‐walled, super‐hydrophobic spores, while ...
Atul Agrawal, Steven E. Naleway
wiley   +1 more source

ATP‐Mediated Bidirectional Communication Between Natural and Artificial Cells for Controlled Bioreactions

open access: yesAdvanced Functional Materials, EarlyView.
Establishment of bidirectional communication behavior between natural and artificial cells. The first type of communication from natural dendritic cells to artificial polymeric cells was achieved via ATP release after cell lysis. The released ATP was taken up via gated UV‐controlled permeability increase of the polymeric membrane for performing ...
Ilona Kalte   +6 more
wiley   +1 more source

Modelado en espacio de estados de un conversor CA/CC monofásico aislado con alto factor de potencia

open access: yesRevista UIS Ingenierías, 2013
En este artículo se presenta un modelado detallado de un conversor de CA/CC con capacidad de corregir el factor de potencia, representando los circuitos en los diferentes ciclos de operación.
Jorge Antonio Tenorio-Melo   +2 more
doaj  

Advances in Solution‐Processed Textile Triboelectric Nanogenerators: Ink Formation, Processing Strategies, Applications, and Challenges

open access: yesAdvanced Functional Materials, EarlyView.
Advanced ink systems for solution‐processed textile triboelectric nanogenerators are systematically summarized, spanning conductive, tribo‐negative, and tribo‐positive layers. By connecting ink chemistry, deposition methods, and device function, the present review reveals the key governing principles of solution development and highlights practical ...
Xinlong Sun, Stephen Beeby
wiley   +1 more source

CONVERSOR CC-CC ELEVADOR (BOOST)

open access: yes
Este artigo aborda os conversores CC-CC elevadores, também conhecidos como conversores boost, que são dispositivos eletrónicos de potência usados para converter uma tensão contínua de entrada numa tensão contínua de saída de valor superior. É explicado o
Miguel Marques Silveira, Alexandre   +2 more
core   +1 more source

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